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Subject[PATCH 16/85] perf thread-stack: Accumulate IPC information
Date
From: Adrian Hunter <adrian.hunter@intel.com>

Cycle and instruction counts are added to the stack. The IPC of a
function and all functions it calls, is also recorded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190520113728.14389-14-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/thread-stack.c | 14 ++++++++++++++
tools/perf/util/thread-stack.h | 4 ++++
2 files changed, 18 insertions(+)

diff --git a/tools/perf/util/thread-stack.c b/tools/perf/util/thread-stack.c
index 41942c2aaa18..8e390f78486f 100644
--- a/tools/perf/util/thread-stack.c
+++ b/tools/perf/util/thread-stack.c
@@ -49,6 +49,8 @@ enum retpoline_state_t {
* @timestamp: timestamp (if known)
* @ref: external reference (e.g. db_id of sample)
* @branch_count: the branch count when the entry was created
+ * @insn_count: the instruction count when the entry was created
+ * @cyc_count the cycle count when the entry was created
* @db_id: id used for db-export
* @cp: call path
* @no_call: a 'call' was not seen
@@ -60,6 +62,8 @@ struct thread_stack_entry {
u64 timestamp;
u64 ref;
u64 branch_count;
+ u64 insn_count;
+ u64 cyc_count;
u64 db_id;
struct call_path *cp;
bool no_call;
@@ -75,6 +79,8 @@ struct thread_stack_entry {
* @sz: current maximum stack size
* @trace_nr: current trace number
* @branch_count: running branch count
+ * @insn_count: running instruction count
+ * @cyc_count running cycle count
* @kernel_start: kernel start address
* @last_time: last timestamp
* @crp: call/return processor
@@ -88,6 +94,8 @@ struct thread_stack {
size_t sz;
u64 trace_nr;
u64 branch_count;
+ u64 insn_count;
+ u64 cyc_count;
u64 kernel_start;
u64 last_time;
struct call_return_processor *crp;
@@ -289,6 +297,8 @@ static int thread_stack__call_return(struct thread *thread,
cr.call_time = tse->timestamp;
cr.return_time = timestamp;
cr.branch_count = ts->branch_count - tse->branch_count;
+ cr.insn_count = ts->insn_count - tse->insn_count;
+ cr.cyc_count = ts->cyc_count - tse->cyc_count;
cr.db_id = tse->db_id;
cr.call_ref = tse->ref;
cr.return_ref = ref;
@@ -544,6 +554,8 @@ static int thread_stack__push_cp(struct thread_stack *ts, u64 ret_addr,
tse->timestamp = timestamp;
tse->ref = ref;
tse->branch_count = ts->branch_count;
+ tse->insn_count = ts->insn_count;
+ tse->cyc_count = ts->cyc_count;
tse->cp = cp;
tse->no_call = no_call;
tse->trace_end = trace_end;
@@ -874,6 +886,8 @@ int thread_stack__process(struct thread *thread, struct comm *comm,
}

ts->branch_count += 1;
+ ts->insn_count += sample->insn_cnt;
+ ts->cyc_count += sample->cyc_cnt;
ts->last_time = sample->time;

if (sample->flags & PERF_IP_FLAG_CALL) {
diff --git a/tools/perf/util/thread-stack.h b/tools/perf/util/thread-stack.h
index 9c45f947f5a9..bddb1daf6453 100644
--- a/tools/perf/util/thread-stack.h
+++ b/tools/perf/util/thread-stack.h
@@ -52,6 +52,8 @@ enum {
* @call_time: timestamp of call (if known)
* @return_time: timestamp of return (if known)
* @branch_count: number of branches seen between call and return
+ * @insn_count: approx. number of instructions between call and return
+ * @cyc_count: approx. number of cycles between call and return
* @call_ref: external reference to 'call' sample (e.g. db_id)
* @return_ref: external reference to 'return' sample (e.g. db_id)
* @db_id: id used for db-export
@@ -65,6 +67,8 @@ struct call_return {
u64 call_time;
u64 return_time;
u64 branch_count;
+ u64 insn_count;
+ u64 cyc_count;
u64 call_ref;
u64 return_ref;
u64 db_id;
--
2.20.1
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